Set the band width to 96000 in the bandwidth menu and decrease the zoom in the RF window to zero. The most I have been able to see in the audio window (lower window) is 48K even with a 96K audio adapter.

On Windows, HDSDR is your friend. I have tried all the windows based SDR applications and hands down it is the easiest, most intuitive application available. It does not have all the bells and whistles but what it does, it does very well. But alas HDSDR development appears to have gone the way of the Peaberry V2. There has not been an update since November of 2013.